Bump XLOG_PAGE_MAGIC due to the addition of wal_compression=zstd

While on it, fix a thinko in the docs, introduced by the same commit.

Oversights in e953732.

Reported-by: Justin Pryzby
Discussion: https://postgr.es/m/20220311214900.GN28503@telsasoft.com

doc/src/sgml/config.sgml

@@ -3158,7 +3158,7 @@ include_dir 'conf.d'
         <literal>lz4</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
-        was compiled with <option>--with-zstd</option>) and
+        was compiled with <option>--with-zstd</option>).
         The default value is <literal>off</literal>.
         Only superusers can change this setting.
        </para>

src/include/access/xlog_internal.h

@@ -31,7 +31,7 @@
 /*
  * Each page of XLOG file has a header like this:
  */
-#define XLOG_PAGE_MAGIC 0xD10E	/* can be used as WAL version indicator */
+#define XLOG_PAGE_MAGIC 0xD10F	/* can be used as WAL version indicator */
 
 typedef struct XLogPageHeaderData
 {